在SQL Server中使用查询的表中的复选框类似功能

Question

I have a primary table with multiple records for the name but different quantity and colors.

TblPrimary : current table

id | name    | color | Quan  |
===+=========+=======+=======+
1  | Apple   | Red   | 10    |
2  | Banana  | Yellow| 5     |
3  | Mango   | Yellow| 8     |
4  | Apple   | Green | 20    |
5  | Banana  | Brown | 15    |
6  | Mango   | Orange| 12    |
7  | Mango   | Green |  5    |

This is my main table and I basically want data from the primary table like this. So basically the Quan in main table is sum of all individual Quan from the primary table. The colors (Red,Yellow,Brown) in the main table; are bits which indicate whether that color is present for the fruit or not in the primary table.

TblMain : new expected table

id | Name    | Quan  | Red | Yellow | Brown | Green | Orange |
===+=========+=======+=====+========+=======+=======+========+
1  | Apple   |  30   |  1  |   0    |  0    |   1   |  0     |
2  | Banana  |  20   |  0  |   1    |  1    |   0   |  0     |
3  | Mango   |  25   |  0  |   1    |  0    |   1   |  1     |

I have got the below query and I have group by and the sum. I am not able to get the colors portion of the main table populated.

INSERT INTO TblMain(Name, Quan)
    (SELECT Name, SUM(Quan)
     FROM TblPrimary
     GROUP BY Name)

Answer 1

You can try to use sum windows function in subquery then use condition aggregate function make your expect result.

select  ROW_NUMBER() OVER(ORDER BY name) id,
        name,
    Quan, 
    SUM(CASE WHEN color = 'Red' THEN 1 ELSE 0 END) 'Red',
    SUM(CASE WHEN color = 'Yellow' THEN 1 ELSE 0 END) 'Yellow',
    SUM(CASE WHEN color = 'Brown' THEN 1 ELSE 0 END) 'Brown',
    SUM(CASE WHEN color = 'Green' THEN 1 ELSE 0 END) 'Green',
    SUM(CASE WHEN color = 'Orange' THEN 1 ELSE 0 END) 'Orange'
from (
    SELECT name,
    color,
    SUM(Quan) OVER(PARTITION BY name ORDER BY name) Quan  
    FROM TblPrimary
) t1
group by name,Quan  

sqlfiddle

Result

id  name    Quan    Red Yellow  Brown   Green   Orange
1   Apple   30      1   0       0       1       0
2   Banana  20      0   1       1       0       0
3   Mango   25      0   1       0       1       1

Answer 2

You can use PIVOT to convert values to columns. In your case this becomes a bit cumbersome, because you want the row sum as well as well as the 0/1 flags

SELECT
    name,
    ISNULL(Red,0) + ISNULL(Yellow,0) + ISNULL(Brown,0) + ISNULL(Green,0) + ISNULL(Orange,0) As Quan,
    CASE WHEN Red IS NULL THEN 0 ELSE 1 END AS Red,
    CASE WHEN Yellow IS NULL THEN 0 ELSE 1 END AS Yellow,
    CASE WHEN Brown IS NULL THEN 0 ELSE 1 END AS Brown,
    CASE WHEN Green IS NULL THEN 0 ELSE 1 END AS Green,
    CASE WHEN Orange IS NULL THEN 0 ELSE 1 END AS Orange
FROM  
  (SELECT name, color, Quan  
   FROM dbo.TblPrimary) AS SourceTable  
PIVOT  
(  
   SUM(Quan)
FOR color IN (Red, Yellow, Brown, Green, Orange)  
) AS PivotTable;  

If you display the sums directly for the colors instead of the flags, the query simplifies to:

SELECT
    name, Red, Yellow, Brown, Green, Orange
FROM  
  (SELECT name, color, Quan  
   FROM dbo.TblPrimary) AS SourceTable  
PIVOT  
(  
   SUM(Quan)
FOR color IN (Red, Yellow, Brown, Green, Orange)  
) AS PivotTable;

And the result will be:

name     Red  Yellow  Brown  Green  Orange
==========================================
Apple     10   null    null   20     null
Banana   null   5       15   null    null
Mango    null   8      null    5      12